Dominant ninth flat five chord

A dominant ninth flat five chord is composed using a root/1st, major 3rd, diminished 5th, minor 7th and major 9th (or R/1-3-♭5-♭7-9) intervals played simultaneously. Generally written as C9(♭5) or Cdom9(♭5), it is good practice to simply use an uppercase C followed by a super scripted 9(♭5) to represent it in writing (ie: C9(♭5)).